#ifndef _ALG_UTIL_H_3cc2cc3b_
#define _ALG_UTIL_H_3cc2cc3b_

/* This file is in the public domain. */

/*
 * Utilities for use by algorithm code.
 */

/*
 * xor_block XORs two blocks of bytes together, putting the result in a
 *  third.  The arguments are the input blocks, the output block, and
 *  the byte count.  The output block may equal one (or both!) of the
 *  input blocks, but if it overlaps an input block but is not equal to
 *  it, the resulting data block is undefined.  Provided this undefined
 *  condition does not occur, the input blocks may overlap arbitrarily.
 */
extern void xor_block(const void *, const void *, void *, int);

#endif